body * {
    box-sizing: border-box;
    flex-shrink: 0;
}

body {
  font-family: PingFangSC-Regular, Roboto, Helvetica Neue, Helvetica, Tahoma,
  Arial, PingFang SC-Light, Microsoft YaHei, serif;
  margin: 0;
}

input {
    background-color: transparent;
    border: 0;
}

button {
    margin: 0;
    padding: 0;
    border: 1px solid transparent;
    outline: none;
    background-color: transparent;
}

button:active {
    opacity: 0.6;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

.flex-row {
    display: flex;
    flex-direction: row;
}

.flex-wrap {
    display: flex;
    flex-wrap: wrap;
}

.justify-start {
    display: flex;
    justify-content: flex-start;
}

.justify-center {
    display: flex;
    justify-content: center;
}

.justify-end {
    display: flex;
    justify-content: flex-end;
}

.justify-evenly {
    display: flex;
    justify-content: space-evenly;
}

.justify-around {
    display: flex;
    justify-content: space-around;
}

.justify-between {
    display: flex;
    justify-content: space-between;
}

.align-start {
    display: flex;
    align-items: flex-start;
}

.align-center {
    display: flex;
    align-items: center;
}

.align-end {
    display: flex;
    align-items: flex-end;
}

.page {
    background-color: rgba(255, 255, 255, 1);
    position: relative;
    max-width: 450px;
    width: 100%;
    overflow: hidden;
}